{
  "manageEntity": {
    "action": "Save",
    "entityId": "1973727570",
    "entityType": "Track",
    "nonce": "0xf736001eb4efd6857915e615de3e94767692d126bfe1beef3abf10e014ee280e",
    "signature": "0xc9f7248d27da0c9d33ae849612e0fbf954776ae69f7073fc81d754e15d1a918443f99a4207a85c1faeae8d006959e96c8980f5a9abed43df6ddea860229e6d991b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}