{
  "manageEntity": {
    "action": "Save",
    "entityId": "862292875",
    "entityType": "Track",
    "nonce": "0x6f5c87864e590643abb3444110ce05b60815fd0fafbd2dacdbf2690bf1578a28",
    "signature": "0xb9bcad30b57342d51bf16ed440b92c05973561316ba920afba5683a142069d605d1a4d69f9060b5d2f1b58691d38893c38801bbcb037ef82eaf660bdf16cdd831c",
    "signer": "0xB8eB041c99d83265B611e0d5172A226432Aa8e74",
    "userId": "763164503"
  }
}