{
  "manageEntity": {
    "action": "Save",
    "entityId": "1090746821",
    "entityType": "Track",
    "nonce": "0xcce58794e53ccd7e1e121e7123f4a680a90737fb4ca086e72e61111e878cd2a9",
    "signature": "0x124fb50550176316821d46d50254fd113dc5f3ebe4c32392c9a1fd75c29266c82b5d56925bb155d5d8f289d24cb1aa9d1b53e029d42c6291e057bd7cca9df4bc1b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}