{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "149153309",
    "entityType": "User",
    "nonce": "0x3853e1a1dbd5d8c7a93a053a99b5d29725a009a63c15b705ef2e8367251be73c",
    "signature": "0xb4cd89dfc8ab4ef06ac605ada7d21c8875e7119c0eefdbceecfc50a34957811a4846003f632110b7bbec28041d756b6141709947d0c10c4d3a311e28c3eff5a51b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}