{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12720",
    "entityType": "User",
    "nonce": "0x751bfe9026b48ab2bb40f2e1c591cf6308a30c117fa90df381bb585c4bf78566",
    "signature": "0x5985df00b9250f95c4ef25fc76af243be3a0f516f46c9c73bb837eb980e329553758451574a623551e3d9e0413eff135410df3602e589a1b66eb20e449dc55be1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}