{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "306850",
    "entityType": "User",
    "nonce": "0x3846fecbc96216c6873009e16350497fec6ce05539a86a0a9190188f1152c8bb",
    "signature": "0x681ce4aa8ef1088ab07d46dd724e0557c24fef30c7606120d3d6e37cce67cf1b0d39a24810331bda1dda3ea297f2972d86edbdbe49c1702d836f62f13c44d2871c",
    "signer": "0x1F7AD5e639e74f62C577d6ee9140C839b0100481",
    "userId": "513323235"
  }
}