{
  "manageEntity": {
    "action": "Save",
    "entityId": "1751133236",
    "entityType": "Track",
    "nonce": "0x91c5a58e12ae4779ff1d8804de07c16789bb3925bfad7e9197aa8018fd9e7524",
    "signature": "0x3fb79da4700f87f88bd2dc7fc43df8753b91b57b583647c08652d78d6c6b37694a75955bf48ecb150b18f73059fb14f8668d9b8b04a414c2672869cc6028fb701c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}