{
  "manageEntity": {
    "action": "Save",
    "entityId": "370077067",
    "entityType": "Track",
    "nonce": "0xc95ea67554e6a1a8cd19d929730df06e580f5201e69d0f9d9727b6e43ee8f76b",
    "signature": "0x1875020807dda887c4cd8f5ae4b5844bea3d80542c26388b2399c0957c94a4d72a213aebd2d7b8e97d682e5ece9d06350bc8fa5d381bfafeebd05053c74ef6071c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}