{
  "manageEntity": {
    "action": "Save",
    "entityId": "898424569",
    "entityType": "Track",
    "nonce": "0xfbb268fe71fb5f870fb3294271b1bab0cb7cb131c56af21504abb9d4cd8d33b5",
    "signature": "0xec20f4b2d3d18e3be81d05046009aef9f146653f8a3b4de793df37602d0245c9159fa43ce662b8bb40965089216bd965849461532949bd42f40c818af82b762b1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}