{
  "manageEntity": {
    "action": "Save",
    "entityId": "66871105",
    "entityType": "Track",
    "nonce": "0x607479b1ee7300bf420166c530cbc135933c6bd17b1acad2774793b21950c688",
    "signature": "0x3245626094e5897bf7f7256b1f48a2a1017359761a2ed23f45c6270071828646592a5dc14262a5301fd8442f7f4f27437e66cb8e036c139a2edf7bf6671907f61b",
    "signer": "0x697B9B9E4eD334E787D1C9b050bBd6A12bF84208",
    "userId": "20671471"
  }
}