{
  "manageEntity": {
    "action": "Save",
    "entityId": "288336",
    "entityType": "Track",
    "nonce": "0xc3f06702f96f99ddef7566f64ec695d6a20918378935db005a30056cfb1a6d48",
    "signature": "0x8fa3e30e2a0539fb84e41991bc078a389c88dbafa9a99c309d829fbb6d4966ce3479281bfd2cec6c43172bc615edda9cc08f2105f1bbca13a4d9fa86df51d0f21b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}