{
  "manageEntity": {
    "action": "Save",
    "entityId": "1107466",
    "entityType": "Track",
    "nonce": "0xe6938291bbb851ab48d42b66e76a4002ff8841e06b77b2cd460429e3673640d2",
    "signature": "0x7b85d3dec96528275e311f9bc1cb187e9fdac828039f0a4a20ad3d6c5116d0b67d9f343f50dde939b7c01c16dd7e5f5a978ab3d575b9e4b60930d8aa913dc5cb1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}