{
  "manageEntity": {
    "action": "Save",
    "entityId": "25626",
    "entityType": "Track",
    "nonce": "0xbf86ac0217911fbb812d2d02fc546ede40ea785bb7b3e6803d0f7032a0c8d889",
    "signature": "0xb94b593b93c7d4c19d336123515e70a29bbb4f032d2490b0252838edd1e0fe4638742421da305da5c9ba33bb134ae0ec98e060d660d24326f1a9dc2f85da81f31b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}