{
  "manageEntity": {
    "action": "Save",
    "entityId": "408244774",
    "entityType": "Track",
    "nonce": "0x2629d7ffd9ef4c4e0fbaee40e002547885b0ed27a4038bafd10e2cf358c127ab",
    "signature": "0x4fe8cdf601f5f89cdece696d0ec487292b75c38aebcab215929004b1a83234841ab5b7efc93473d3786e8918f2d94e252f85f8d0624c268b8324651c0bc5c6361b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}