{
  "manageEntity": {
    "action": "Save",
    "entityId": "1811373517",
    "entityType": "Track",
    "nonce": "0x3cb782ba79321688a1676f0d9e85ac1f241d15d66242cdcb8ef327c9f18e779f",
    "signature": "0xb78918604fb1dc6bec09a6e4ee766226e3474c96744a0e1b395f5d49286d02654258615391f1bfc37134a997717f0544fe7720fa01a6950c4ac1c61f0859ee041b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}