{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "53770",
    "entityType": "User",
    "nonce": "0x8b41a17f4dedbb8c694dfdca37afdf2c64c3a4effa12547ceb8b7e648e1f86bd",
    "signature": "0x1ae78db4aefe34a07c7aafd2f0947539f9b6aea9b7ab4768b15e03d98a8bb8be38e4aebecabeed5410e12d04f0d61a1cdfd3f3f99dfe692d4e81def8655460f01b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}