{
  "manageEntity": {
    "action": "Save",
    "entityId": "68054662",
    "entityType": "Track",
    "nonce": "0x4f0af6a07ffe6cfad5e531ff998f1d9fdf895271256796c3f7af4a9d99dd0e3b",
    "signature": "0x7d93b387af12733e8b09c46b4312bc76302799a32c10822b0dbd80c09f6ba8a73bfce9d20dd20c7207b1723ae5564dfd6d3b76b697b21458b3fe350236dc78d21b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}