{
  "manageEntity": {
    "action": "Save",
    "entityId": "1555031799",
    "entityType": "Track",
    "nonce": "0xf066ce7c297e409212dc951610480b5532849981ea3a007efaedeb0e75791ce3",
    "signature": "0xb3aed33d8024f8ad5779a4541c99531ed3a6b1b6498453c47151c18eb8755c913e130c23335c00c578758b1186091a28562d9a50bd9e2aa491f52d01380579681c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}