{
  "manageEntity": {
    "action": "Save",
    "entityId": "338186345",
    "entityType": "Track",
    "nonce": "0x902d49fd4362e6c532e086d00a79520dab33c70c845e190bfca1a26c05bca5a3",
    "signature": "0xe7a9c6984bbe24afccc59d7a37af5752bf22a39a131c193202a9851916bf50b769ae4f94d5188b2542cb441cf98b97ce22e5a8dc64da1cff9499c9445bd8367a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}