{
  "manageEntity": {
    "action": "Save",
    "entityId": "629824522",
    "entityType": "Track",
    "nonce": "0x543f9e7fde9bf6261a6e79efaa942713072ce6f70806e09449a3646a9f1ca9d6",
    "signature": "0x1eb1feb61a11c3c010fbf5edd333ca9964bb4a67e1325add0416575ab4d2120449715209f819b1a0dcf8ac9e9489a61da8ccf6250e251e1c5b2f54d02e9478fd1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}