{
  "manageEntity": {
    "action": "Save",
    "entityId": "413793",
    "entityType": "Track",
    "nonce": "0xccb22d855d09a9ce68b7df29fe0ea32727badb8972a94206086d626ac958fbb3",
    "signature": "0x05b532705828d078a60e081fa82ee184ff8e6ae7ea929c12bc8533588d7127992d59ab9c949ad96fc4a9391eb2ec60e5b093494533f03fd9d862cdf96a46dff31c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}