{
  "manageEntity": {
    "action": "Save",
    "entityId": "2052164064",
    "entityType": "Track",
    "nonce": "0xd9365b2f198811e2dabc50dc654833627fddc35e9cdb104241091304f6acc48e",
    "signature": "0xffbe528b351b1fce663724a8133b85bc9549b9964cea1b6af087af8552450a822764123e2987eb9d19f82e4ffb3c74cf3048de057ff66302371b6f106fd3731a1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}