{
  "manageEntity": {
    "action": "Save",
    "entityId": "739778343",
    "entityType": "Track",
    "nonce": "0xecd95d72cf0a7c1b82624d53cd40210bc5b6941b0e62282513531df62c3635f4",
    "signature": "0xc9507875d67e29cf782b7e1131a355c61954855a01e8fc1fb2deec4b530e703a290c648934b0b90ac9adfb62e3f8cdf1961c5d4fb2e8f6f8b38c501a5b09819c1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}