{
  "manageEntity": {
    "action": "Save",
    "entityId": "505210",
    "entityType": "Track",
    "nonce": "0xa99996ac62cbee5902a66f818108a263ad65a10830e7b184b94ed99e16bb73a6",
    "signature": "0x4218fe6d338280a5519606bceb0ef5484fd01a75612e255656f6b40e2c40f873386cbcd46473dbd75a0617412aa207ccdb5c0037765ba0b2919f7aa5da7ace7f1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}