{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458078217",
    "entityType": "Track",
    "nonce": "0x137c2ab9cff1221315520574c6f39dd3aebd7e0bdb7e6daed5f0f49571efa9e7",
    "signature": "0xaf13e286756f8c72218107f30f2eb03ec3e7ac5cf16fe2d34bc9d31a591b822d0c15929a90ace839c427616ee48898504d22d16920045475ac1f634badba50231b",
    "signer": "0xaFdEC27229de1023f5322f4Dbf0e874dC548011F",
    "userId": "817564020"
  }
}