{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580426020",
    "entityType": "Track",
    "nonce": "1786032331137958002",
    "signature": "0xb54a322b86ece1eb6ad8b6a5ffd6aaaced1ec0bf88f8399007c0f9ad3f32ed2744e4581c312aa17de3391ad261fd92a04fe3184e414c47da611325d27514fa831c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}