{
  "manageEntity": {
    "action": "Save",
    "entityId": "888478731",
    "entityType": "Track",
    "nonce": "0xe5259b723a1ed0d484642519ddc6b1aaa0f05cbea0c1aeee720f841dacf796cc",
    "signature": "0x76ea27a0a39168a1a4b03eeb1b0cb450ec37c7ccfa60da931fc875ca877548fe017dbb334a119aad9776aca2d8157c2a342d09db6c33b496f1e0cbd3b412828d1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}