{
  "manageEntity": {
    "action": "Save",
    "entityId": "823729033",
    "entityType": "Track",
    "nonce": "0x071e6cf454e7c2e3a894d124da2f4a76535c07a9388b1d649b9546a1a00e5846",
    "signature": "0x2aac7b04096e768220afb58cb86eff85ca4df93d0555624b23d1e49aea2ab1357029695371905936baab342918398397cb501c3be39f4539f7d87ac02d51fb571b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}