{
  "manageEntity": {
    "action": "Save",
    "entityId": "73211318",
    "entityType": "Track",
    "nonce": "0x0f08611b1cfebb9efd6f282ed6b83ab75a32aaa1e8db7d5338cda0f1a9fd9e27",
    "signature": "0x3b896dec73962de1a73e1faa05f288d67694cddd13eed2462e7a7656f9790c7758b452c893a4f3227b3019f9eb49b2e1d0a9155827394db4ce7e132d05752da81c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}