{
  "manageEntity": {
    "action": "Save",
    "entityId": "1538402470",
    "entityType": "Track",
    "nonce": "0xbec65609823f7324eb9e91c44469d03560a59bd40711f06db6f41303db9c83c7",
    "signature": "0x4a815b8b12120672349a0d2e3709ce145fc089ffd57e164a207f847ae4a4b66f6b0d5d6ca82b88539082da1b8a4f279581c66180bba10d62818d65c7363b8ba51c",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}