{
  "manageEntity": {
    "action": "Save",
    "entityId": "135122782",
    "entityType": "Track",
    "nonce": "0xd2adf12a325f6538f7a29c1a1a0bc32d58e6a9db486dfcec36368b7d3d344596",
    "signature": "0x85d11509e68bb97fed0830ded7e6fc18b94bd8bac800903790df3ff506c396686a47b3eaff70db9d7cdc3400d5072419fef371dc7c9a3a3b6676a27579bd49f21c",
    "signer": "0x58501cE232db1f85664761410c7F8FD055342AF7",
    "userId": "123836"
  }
}