{
  "manageEntity": {
    "action": "Save",
    "entityId": "1136127",
    "entityType": "Track",
    "nonce": "0x3c8107c88d3de18b7437753dce4d9ed7736beeddd9717870a66262e35254a241",
    "signature": "0xf8ca43498a696556880c98ae2a485a37cf6854377f824684d67db429d20f1f016b77d3ee0988c9a5726b74721dbb7840074f82ec193610dba68317fede0cf7c91c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}