{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x5882d7ec62464c0c81492538ddfe55880d3fbb0f01aa724c4eec0f85f30e8768",
    "signature": "0x36569aad97dcb237e2ad99163f4351078141e8b2f52902525bf4db1c5f569e5e207b189ba2d34890c7070662f1528fa35b4765582c20a99afc83f388b790e9811c",
    "signer": "0x09Ed944A6653804DF5E864d5240c837F643E2c0F",
    "userId": "214509563"
  }
}