{
  "manageEntity": {
    "action": "Save",
    "entityId": "1071221310",
    "entityType": "Track",
    "nonce": "0x2f89a446bf8b76774348b66865e2ca08281bb10e1a83e74fc4e8ac85acb5e515",
    "signature": "0xd30e74357fa2e4492a9eddfcabb41ea56a940771caccef2bd493887a7ed25e2825cca3c38f71240cba331f5443900d30ffedc3ca1860f1de1c9d52664ce66c341c",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}