{
  "manageEntity": {
    "action": "Save",
    "entityId": "1144732778",
    "entityType": "Track",
    "nonce": "0x85ad3838fc75283ce37ae2ef62f62e84319baae31c69d52418e17562b941385c",
    "signature": "0xf4c674412be1e988ed92717a9e47f802536fe5216237acf063f897a837f1a7aa15704a6e676eed2c81b2d787feaa928b8390c013de25e0f340d4c465c7aae9bb1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}