{
  "manageEntity": {
    "action": "Save",
    "entityId": "1229947555",
    "entityType": "Track",
    "nonce": "0xcd2f8687fb7efe783fb28665295096f1b43ae0a484178d48a56ece5cc9786636",
    "signature": "0xebc9f976aa23fe54c25ceaad9a620fed208a5de8c833a34db5c702248f061bf5215e9dd5f88b3828f8d64e13f55c0ba2b6a1b3a9dbbe32f1e7db32891d2d23da1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}