{
  "manageEntity": {
    "action": "Save",
    "entityId": "73927729",
    "entityType": "Track",
    "nonce": "0x5b66adfcf6a8e0b1417e7c555cdfaa4db8462ab3f9ca1026999dea60e61a13ac",
    "signature": "0x05dd5778b0f154ee08fb5d0eb11e70e0127fa9aa3dbe42c3c5cc6926b2216c39167bc86512fa9ea6536238e97fb18fb6a9cc63b1f6dc38299d7a52ba92ca27471b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}