{
  "manageEntity": {
    "action": "Save",
    "entityId": "981566426",
    "entityType": "Track",
    "nonce": "0x043ab095b856d6363f4d16e0a28d934e003b1fe7498d2c91d3b18daf320a22cc",
    "signature": "0xb816716c759b5aee5b908f524267a9d80cf365b08b9c5b783bf69a7f3934f0321c0425ad62450e5b1749f98a3e7f4597ad2206ee03d89759b4e38d085f3c62451b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}