{
  "manageEntity": {
    "action": "Save",
    "entityId": "702194",
    "entityType": "Track",
    "nonce": "0xcc598fd64a002a34e798d044cca129b379afe59d496cf2050f59e2c9b733dcc1",
    "signature": "0x7892a0027d62b37b8e583ac4c67a727817a881df9aa3ce7db5fc103f4837c84c6b8384584fddc9ca70cf66155ed6c2aa7c53a7f902d771ab87a39908531c2caa1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}