{
  "manageEntity": {
    "action": "Save",
    "entityId": "124585615",
    "entityType": "Track",
    "nonce": "0x7db9cd191e2a7fab7e0092b3b59f2b628c799823900b1f2b5be5bf09b09d1f3d",
    "signature": "0x73836c966fc78be5be6f0649e9158728e41024f4950284355250e375f4be35be6ee8b892bf9b47443ed7c2df98e84d3edf5f720d4e6e8995a62604c0e8ed0d221c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}