{
  "manageEntity": {
    "action": "Save",
    "entityId": "681234",
    "entityType": "Track",
    "nonce": "0x7509b046009fd4897d18bcea808591180ced3c4e09fcd5ce4b58d7af63adc973",
    "signature": "0xc7fb724e393ccd24723a6f26314f8f7ba45e9b271aabf86cb1b08c0db3f45f6e03e2c6876a112adcba2db9287f12b45575ea2a7c68a8a73b32479542a34ea2db1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}