{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51899",
    "entityType": "User",
    "nonce": "0x9f18f2e60e815d855e82f954666d036ed7bc9c887b5e136a6508f5571e56dea8",
    "signature": "0x92d6f97a697fe9d344096382fd17f3d9a9f400f66dbfd87d56a2b1b82bc5853d5972a93c336fbbdb85e2f71c9aaf4d125b514b94431a5b65f90739dbbaee73f21b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}