{
  "manageEntity": {
    "action": "Save",
    "entityId": "61946",
    "entityType": "Track",
    "nonce": "0x77fcd54851d9350c38056c64caecce98dfb6bddcb708af3b18c3cfd993f7aca2",
    "signature": "0x0badb9a2a78195488daca66a284f6cb71e65287d33e667cba347a0fda484458e5bf8888337d16e8dd8a8081f4a11f83cbb8b18abdd3ff8da0ac3cd8a94ca5cc51c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}