{
  "manageEntity": {
    "action": "Save",
    "entityId": "278827032",
    "entityType": "Track",
    "nonce": "0x678c49f103661bca18b4bbd5948803df2bf38f23ebb547bca7cbc116c160badb",
    "signature": "0x7e59261116a300fc510c4b2d833c1998b4c1e71425fb2e74601c3c06edbd0dff20313dc026b6468b47b48ccdd197f6004d7ab8ffb2329a8cec8437d6a59820491c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}