{
  "manageEntity": {
    "action": "Save",
    "entityId": "1612004253",
    "entityType": "Track",
    "nonce": "0x18ce8d08ce8dd7a439ed88943f998b805bdc8c426480f9b8837e8484ca7bb1e5",
    "signature": "0xbabd13e378518c948a9bcf5dc36e11aa0ab311cc1003b4ca822e5e9bdd3944fd376c0db95239a318609ea4bb1d1d9de483dfb87d87ed5df87e11472ce59aa97e1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}