{
  "manageEntity": {
    "action": "Save",
    "entityId": "1722280988",
    "entityType": "Track",
    "nonce": "0x37ad6138c3ee122aa77fc844c061de1c92b30ee8f0630f26db964eb0e649c6bf",
    "signature": "0xe61035c70fec7e28fd9bbf10d0e427b013ba176dbbeec34e2ca8be4e85270b2c6bc371ceee1490b517a70680a7a47364d197656f8c0619a824e1480c58cd8f411b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}