{
  "manageEntity": {
    "action": "Save",
    "entityId": "137047452",
    "entityType": "Track",
    "nonce": "0xa35a16c5e897dd427393b3278092344210d49a82a4e8e8ea72e76a843354c9ae",
    "signature": "0x7b50b70cbd995aab51976d7495fa067f8f9ab0ae10db9b4916294abe5dfd4eef3ff4450d5dcd7bc3cd9124e9e1c6e3a4dae0ff8ed317d66fb5cdbac028c091cc1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}