{
  "manageEntity": {
    "action": "Save",
    "entityId": "2078929714",
    "entityType": "Track",
    "nonce": "0xe8bcc6822cbd7b87d1e1b2150fd5046e8eec713bb3a35f33134a4256aff1f08d",
    "signature": "0x43b8e8bd4a1039ca5a67a8e6994ff23ca91cd8da30d4a423371e7082a5a53c7277522f876688e17e71777bbda989d74408ab5e6a7d905c2c38206428d0efb5d81b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}