{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "543686915",
    "entityType": "User",
    "nonce": "0xe950798724970954c0eabca52601a8e1ee655f8634f9cf873a4305fff8bfec84",
    "signature": "0xaa9851d975dc7a0d295ac8b1756eb119e783c83b43001a872b8ceebf20d82d0a489eca747826df06899849fe5bd1d678fc05380c6e8ad435cb5a5fee274f8b861b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}