{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15019",
    "entityType": "User",
    "nonce": "0x63dc885843fb397832c7dba9bd5d4f06fabe61160f944c770d13abeac5b3d1b7",
    "signature": "0xc1f60ac170e98ebda99c08f091cd6a286ce952b53661d7e65067549950c0e6f55f92e39e2ab65f30c8286cc6a39d4b0976b84e88241d8717771422d0918cc5b61b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}