{
  "manageEntity": {
    "action": "Save",
    "entityId": "352424833",
    "entityType": "Track",
    "nonce": "0x2eb9ece98bda4bb9ab88644b4ef39da15e6e9fe7a9aac1954380dd97504064d2",
    "signature": "0xabf6f02a3e9d9302577a95deffcb4b98306289ed288a5d47b90df074ca4b52263aa1e0c117c248e521143a9fad42aaee6477ecf2bb7c07dbda1a0195cd1bd9701c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}