{
  "manageEntity": {
    "action": "Save",
    "entityId": "1423941496",
    "entityType": "Track",
    "nonce": "0x00933703be793745d2c5d5ee88a160b280fed19d2c66426537f1b2b7dc94944c",
    "signature": "0x57d84ed0418ba00b12e6e81fa46dd3dd313161139f67c97040cae0fbfd2f4cd368a301b482366a4d5c22d41f9a12a603a984498700227a375e843f60813dd36b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}