{
  "manageEntity": {
    "action": "Save",
    "entityId": "1882360800",
    "entityType": "Track",
    "nonce": "0x05f803abb144c61ad0fa451907db1fbea53c4f7c3d554ce40a1f80e9e101b1d5",
    "signature": "0x3664c1ad919e8aad3a2000236a739483a4c2c0d1b2c201428270b6f72ed33482589058d5cf6f15f1c2d522fc18245d2eba07ea8448a9d11fc238c8e222663e751b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}