{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098349710",
    "entityType": "Track",
    "nonce": "0x9a9aa0ec4894ed431da8b2fb3c9d297f291bf231eadba1a08613da80b793981f",
    "signature": "0x12c18cc6c3d8f8670a7ef89c8093e1bf123591280cf9179e9ba987baaf0772bc6d52724b0cf54bb5eb02a36907211fa3f767415a6a737f762a7f64b4f1fd3a661c",
    "signer": "0x8f0A5939761dE5f6b984a401d42E21b5B3023674",
    "userId": "925049268"
  }
}