{
  "manageEntity": {
    "action": "Save",
    "entityId": "436414",
    "entityType": "Track",
    "nonce": "0x3f8b7af4557ab50c0047f014704c0c8043fb9d8bf6f85c039d3c58ef6821b073",
    "signature": "0x7928a825e02624a137170592e73b0197090f0bc3ea53f92b3f866f182d641ce7377a5c4ed70804f51611041e03b8df1cc07b4cdac401b890cd71d0523b7129d01b",
    "signer": "0x054e09f99C97c131776f34585E9a5e30a7889717",
    "userId": "248129506"
  }
}