{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "577412293",
    "entityType": "User",
    "nonce": "0xc7531dcfe0f9c2db6e4212a15bd3619d6532c19f9663dad203f6125e8814934f",
    "signature": "0xa91d9137d7270ba094d2fbcf93b3bea39ef1d11aa859f1cd042ff63c5dc52b614af056c3a412c1c0b7c07630030c2d8cb2f51c942c33d93b2c15e53514c24a511b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}