{
  "manageEntity": {
    "action": "Save",
    "entityId": "856411266",
    "entityType": "Track",
    "nonce": "0xac070267a8a93e9ea9860198b67a631f3442e04344bb9e45efedf533ae948347",
    "signature": "0x59762fd369f2ef68a01a86a58c265efe2bf70076beafe1f329c8e1f2890165845c6a7f3b5313e2c045048203402ee5fc36528f0f1014676aa69b1f05951b7e231c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}