{
  "manageEntity": {
    "action": "Save",
    "entityId": "1050407",
    "entityType": "Track",
    "nonce": "0x46236bf0e64f9fb89d0ef5be1f447aeb1a8c94337fbc538b542f989449cebba3",
    "signature": "0x879b754e3d088ed24cc53e617262276a798e142269250137574db9b51868aeec281f10e4f2063845b55d1532abc1d94a0d50e76501894aa87f3d6138b2fdbc8e1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}