{
  "manageEntity": {
    "action": "Save",
    "entityId": "1483280947",
    "entityType": "Track",
    "nonce": "0x596a45130572fa172a36974666641f1ad74849a1e1a3a8137e5f1e338f8b0e75",
    "signature": "0x2203cc0a2e6e076c1e43f971855ef5824a94cfb64a01e1306717c678a623dc3d1a2aacd4c718b523550c6729a503ebf9952d6e3581cbfb69780c82a8263da85e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}