{
  "manageEntity": {
    "action": "Save",
    "entityId": "487244",
    "entityType": "Track",
    "nonce": "0xe7b59ee8f05a73066abe43cb0a11024f3bf080c16a1e25602d1e827aa03db12f",
    "signature": "0x4f6e0e941148973ec0adca96b0503ff178931fe348559baf0a78f4b1fba7308a2e840918e932ddfedc6f4f350a6498f2db6eef1ec39489cd698ab111dccc13471c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}