{
  "manageEntity": {
    "action": "Save",
    "entityId": "703967",
    "entityType": "Track",
    "nonce": "0xe764297bcb11c7f93b5fa81e0ddae341d780efd01eca89efb6dc05e0905e2089",
    "signature": "0x057ca71ac6a373c6a551729b7daa09c9da71c4c508f0f933e08c51d83c32ca6a64a74ff8d57d6541385f01d579d6425ccbb3ef4c34f020dc4a58261769065ec51b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}