{
  "manageEntity": {
    "action": "Save",
    "entityId": "1383678073",
    "entityType": "Track",
    "nonce": "0x994617fb7365869f9e097de92ac4ea85cadfe48907104724847971f501c62bb9",
    "signature": "0xbe77fba184816796ab670ecde6670a62224a649b0ee51947d2107b0d91b302cb78d7e700c8f90fad937e3acee7a5a2ff62b5b40867a66064c9beac0c813fdbd81c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}