{
  "manageEntity": {
    "action": "Save",
    "entityId": "949565224",
    "entityType": "Track",
    "nonce": "0xd98aa72214d0d1c04a39e1227f4d1923a5bc559b369064c9b54445e1629ea6e9",
    "signature": "0x336fc9568e8dfc44a07628cd66ad09583314a694b72f9d2c97c7a8d850adee616d9f87af2f8e5fac76e513f54cd322ff11402e6179b8e432f1cb53f97c5e08591c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}