{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "76543",
    "entityType": "User",
    "nonce": "0xc1c692797baa26d389f4c762c2051aeddc84b0cfb74340ec54347dde739555fc",
    "signature": "0x712e91d824b295a1ee48e4df834efed65802e708a42bef71abfd3298aea1e0b763ec4f439ebb1138f0a154476d6022664ea505468f48a609da53d2d0dedb39621c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}