{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x9ce45e44e60b546d9e1a414135735264b51d53403dbc213221a411c26a6aebf6",
    "signature": "0x5509e8f9843fb8b9bedb9029e71030185f0058aae8fad28dc129020b83a31d000ea64919ae17ab2f173847b7312d4c79619978f41b35e70c3aee417064a4f2831c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}