{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247055304",
    "entityType": "Track",
    "nonce": "0x984690fc0fe596445b3a64ecaa22c058cf00f9e62640e3f5310e211ef76d31c4",
    "signature": "0xad7544ba1171d35bd4e12dca80c7e081dfce5d97d7ad257580330b4d6165d5747beb0bb1bb651e464c38408cb189a805ff08efb76e70adb8db63abbefb7195971c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}