{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "336686",
    "entityType": "User",
    "nonce": "0x548c618cda8f2fc0586fcf1f8a54696d590ebe55004ac20f7554d52f0cb16799",
    "signature": "0x5a0af4b57b2dad6431e833300016267ef828a640bfb448bf6dd975e9c32315e51aa16bb23fa3f60f5984521451d033eb6f79ca6c553f2cf1ae93ffcdaa9084be1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}