{
  "manageEntity": {
    "action": "Save",
    "entityId": "1067958890",
    "entityType": "Track",
    "nonce": "0xdd4e2515049528d1fe8bc2b77aee4fee963fc126cdca9ccb0d95bdb73f947e7e",
    "signature": "0xcc2c8adcaa612f1a67f5a82b935432d20d9591c77888485c4367683cf695cbd018f4a44a16665b04405e186688832528e2dbd5177d4eab5056c884602234f9ee1b",
    "signer": "0xa372026fB2EE30b6F81CE820DcE21B455686A702",
    "userId": "344222954"
  }
}