{
  "manageEntity": {
    "action": "Save",
    "entityId": "662475007",
    "entityType": "Track",
    "nonce": "0xe10d3ec7481b9a0549c51d60ab9cf398f83127be418cbda17f18898774bccb76",
    "signature": "0xc02272bba9ec8d2ee4b3c73654f19b643a4024b724927ce4a664d84accd20645299234ededbfd1bb05d148defc1af09f180f5001016bf74cbbde4d9ea1bc4e221b",
    "signer": "0x3CE307cb27B2Fc2b03Eae311050CA4e8C34Fa57d",
    "userId": "50936"
  }
}