{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "388508",
    "entityType": "User",
    "nonce": "0x286b2c4ce040150f0616bddf7c4d20196aa716634d85234afcd22de136746071",
    "signature": "0x5d0dfa0177f1fbeae2b668bb0b4a9f87a8e20563426ecfff58cd5a4ae67999ec2af3d81870e11a9efa49b71dd9c69e3441f6cb74e441320bb3bff12eb73c6bdd1b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}