{
  "manageEntity": {
    "action": "Save",
    "entityId": "775850702",
    "entityType": "Track",
    "nonce": "0x4c5c020c7ead163291b68de54e7603aa82da471bcdf28748e36f8080a4511de7",
    "signature": "0x2c8b4b4708fe32d3589124a9e9cb533833ddb759e11092f5e1c1661354c0b0ff7508263992401a33f97fe09b540d5cc58a37be494384352c3f4d5ff216c587e31b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}