{
  "manageEntity": {
    "action": "Save",
    "entityId": "655303914",
    "entityType": "Track",
    "nonce": "0x1ac453396ec131db25e7cc207af260f1b736ce29e4282345e1a1646ed4b8df13",
    "signature": "0x23b0b159984bdee91b5099cc3ac6f1739cf7abab3dea78a92939f24135d1f0a21948e2ce15e193e9692ac27ad7fa9e4ff7808319d279b6b8ffbd06ad290589081b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}