{
  "manageEntity": {
    "action": "Save",
    "entityId": "1548581627",
    "entityType": "Track",
    "nonce": "0xe3f8ec0253d26821fc4b5579f2541f75c02a9c259c2fd40a8c661b531ade21b6",
    "signature": "0xec55b8c10700add51baaf6c5d19efbaadcba9befd27864fd7b2361263ffd1bde7a3c5545a4b51878d0811d40712af125da294b165f9a0e4c69f3ae28aa162afd1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}