{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21559737",
    "entityType": "User",
    "nonce": "0x2b6c432b859d2120deb8575046253c936605abf1569d033d4b454fdf6716da0b",
    "signature": "0xf4a1bbf5d80da556638b9ce4180d143de137a8002bab300b5a99eb88397fc4645904e3259b384d6a49d76bab3ee6db0694a575be95f950aa9db6436d003be0ab1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}