{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "980893",
    "entityType": "User",
    "nonce": "0x9c1ac3fa533cdba7dadd63be767c0eac983694d2ca49914129401a16f70adaef",
    "signature": "0x705466fa32cb270bb8ebe1858b0e2eed50d94072b8e586e3f61716705d7f224d2e2f7a9d6f3ac172987035a4ad635e69fe1fdc1afb5ef2b520fa48d2850b779e1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}