{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2043401",
    "entityType": "User",
    "nonce": "0x7574d30a5785ffadf290cc5981eb14ceff2b7b0b53f2c9c60eeb43e7ac6406b4",
    "signature": "0xa4a6b3a16ec7d206bc866f26b07b6ff2dbab1b26fb9d1e9df59ec17eefe74e167dc34aed1e4e599226dc1db51a5d49c4a0a21812fc1e398bcda84d00bb3286491b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}