{
  "manageEntity": {
    "action": "Save",
    "entityId": "1009201144",
    "entityType": "Track",
    "nonce": "0xa740bd1f9dd675869c54e292aad81a618a7724ea786871d2634549503b969e91",
    "signature": "0xfeb1d77b9cd3581fa6c27d67887ead4e828c37f088ab00d44e04f9071286420a7da3fb9d686b831060818a766b22d2cce9a9bc0917e900d5629e403044703dd31c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}