{
  "manageEntity": {
    "action": "Save",
    "entityId": "1956148196",
    "entityType": "Track",
    "nonce": "0xddc24bc50bb8305fcfb3cb77415b3116f4399204ba718e46b05d508c0b6306a1",
    "signature": "0x1514950d6764a25b48ae8910abf143146069727ed46706f5a6bfec725ad1dacc0c9c3e67beb2a15604ac8fc5b93e690c4e3e2a52dda77bd2e61b5b65cb4922a81b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}