{
  "manageEntity": {
    "action": "Save",
    "entityId": "690106299",
    "entityType": "Track",
    "nonce": "0xdacf4204433e198df8ab2a2fde6f33ea0ca9e673cd5dc01982499d126e625b08",
    "signature": "0x30405cea2c2637789eb6ac7d8cf49f7337145628e9fc47f324a6026bbe71616e672be5b0b3184564452166ad73621c08c5bda81d0cf484c31da9fda934b699dc1b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}