{
  "manageEntity": {
    "action": "Save",
    "entityId": "848541759",
    "entityType": "Track",
    "nonce": "0x01382ffa5d40b1c335e0282bb215e5fa650474d2f0fa2b8a2843a9e9d8dc8c7f",
    "signature": "0x3ba65e47fe1cc1b235e3f67c108857f14ce991871abb7d2f7bf609275271ad7f2ee6f7d51f46424ea9b88162e54401c77f31e17c578c7a446741e63e3c2c62cb1c",
    "signer": "0xcd864e8A0A043bf1B2DA4106C35c1daF234468a5",
    "userId": "784246910"
  }
}