{
  "manageEntity": {
    "action": "Save",
    "entityId": "1587993118",
    "entityType": "Track",
    "nonce": "0xd8060f567340e59b487010038dea322357c1e647d5800472be3376000c1ebc97",
    "signature": "0x2344026e83b03ac27ef4c20fcd382d6b662d7d76f92716a1da5b5de5a2446cf71020d8f81b13748804f6dd6870837832a4f1f87596b21bd2937028fcde2593851c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}