{
  "manageEntity": {
    "action": "Save",
    "entityId": "2304018",
    "entityType": "Track",
    "nonce": "0xcee251ab85631cb573f90aed51b4e44450e34cb79ee5a08c43954e321696aa16",
    "signature": "0x222a7f946b382c802859d65028e3b44247a96f9d9c715122735d324f867865524c3bef64742471a517cc9faeb9d7dda920b78fa36331e75ee6ad9c62c203a4831b",
    "signer": "0x94072C091E5edAf7bbccf2aC8257a1590541a307",
    "userId": "987917854"
  }
}