{
  "manageEntity": {
    "action": "Save",
    "entityId": "692572",
    "entityType": "Track",
    "nonce": "0xed5c794142159d64d51a3ebef0286adcf22ec812d87d5515b17e76d40b0a17e1",
    "signature": "0x40b5396c493ed47eb417ea34dd98af566140c4f144d026bafbf772516f78e3fe1051dcc63e86e85b96cac062ed70051ed84cae72109f437e6ce2f07ff6bb936d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}