{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900066767",
    "entityType": "User",
    "nonce": "0x718b61ba6b154dbe0fa79a107055864a619d5a713b900200edd3e38169dc41e6",
    "signature": "0xa0266d419224a8625796f91e604168387f08b87097501199af1850dd0f4eaf47213b77abdb1d1bba8466baeae91b38040a85209c67c857c578a2e9dae95f2dad1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}