{
  "manageEntity": {
    "action": "Save",
    "entityId": "171902251",
    "entityType": "Track",
    "nonce": "0x84d06ea3781c69a76e75efad1ae335012f8f0a8da9b65f4ff59395e6acd4f41b",
    "signature": "0x74373ff97a33489c05596973a149a55926c103ffadcade91892f1f502750c46d4c10306fa7c02070a62d8eca59a22acd57a79e1d82319d3d208aa2aed794a9e41b",
    "signer": "0x0dF9c182E9837a72f357047232872AeFd17c78DC",
    "userId": "356897268"
  }
}