{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54711",
    "entityType": "User",
    "nonce": "0xe0081cda2d2fa087ae45937b314dbe8f486dd96d2fae5fb385a83b0a8efd330f",
    "signature": "0x5e849d5ed08eea8057a5495d90623023043dea05fb852024c66fb02d6208949a776b7813535d01b9fcad9c1ae0fddb45d882a2e3ee0de7e951be8d78fe422b611c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}