{
  "manageEntity": {
    "action": "Save",
    "entityId": "1070373640",
    "entityType": "Track",
    "nonce": "0x1ded3156ddaba17ac291de244f3241f0e8b2e1b43403af2d835a97d830aa9fff",
    "signature": "0x9943504c7866310cdaa5b7d0603c5ee8ae47b1202f8b5025212a896a97a2ce1052f282f19273d9cd7819bc8ccbeb9499d14ab7b7a6936c442f0665a801d97fc31c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}