{
  "manageEntity": {
    "action": "Save",
    "entityId": "179514920",
    "entityType": "Track",
    "nonce": "0x8ce6d4f3b49b6db6bc0103083a3aa727ffb67f35c5b681f11f1d3fbb5af182c4",
    "signature": "0x8803bcd9a350d6b75469078756255daf619b54e4b6820baba00656f98c906e010523ab58aa80a7c0db4ce4cc8e2ba256b91bb066db1b91c43bf9e2289f89378b1c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}