{
  "manageEntity": {
    "action": "Save",
    "entityId": "1510963667",
    "entityType": "Track",
    "nonce": "0xd3616a39bfcee22c40ad44bfa1f02dc66adb74ceb90b6d7e033b876bea0bf1e4",
    "signature": "0x75859086004127127bc602c398ef577fa1ed2306d63cd1cab7deca4e8d774f5a19ec935eafe8f17cd32fa52d08866ed2535d2a2e12ef984801a0ba5ff06bbaa01c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}