{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "773501378",
    "entityType": "User",
    "nonce": "0x8f6d492f0129a7b0018bc2462d2d9c7cee7e09cac5b6065aabbd0d8f2dfc4300",
    "signature": "0x3a8f01ec7291d2ead43ff1a4f616e5268e3034d964855977043d8203d0d62adf2a00bd1d81204c3f0257c83eaeef9254773cc114a7644d62838301d32ad5cd6b1c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}