{
  "manageEntity": {
    "action": "Save",
    "entityId": "2099341904",
    "entityType": "Track",
    "nonce": "0xcf5b4092f06acb8423169cb97de0af5fe4860d820e24442c7856fbaac261c287",
    "signature": "0x1701c5cf86c8cd5ac840efcf08890182d27fc4feb4b92c69bccf9b3dd3522dcb08575e29c77f4eb8a1781abec7fd0eab81d4fe8fd7650c82530d3aa14d00d40c1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}