{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0xa3740b7c35e079d201ac10e5956730e3d44f645f76a0e1f46686521474d29f81",
    "signature": "0xeb500372eab8ea58ae5fa61854c469a94e8d17349a8dd4f4d1167969f4dcb0d7093116138d5f2b26ef565953496d278a13449f1980a4f9701f0fd18d0f766d4e1b",
    "signer": "0x4fADC28D15fC4B42A6ab378E5b6155d0b8F33aaA",
    "userId": "372589391"
  }
}