{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "6600",
    "entityType": "User",
    "nonce": "0x39a7131ccc54906a954f20223426d29a45d2ba03b333a133ae554c506e668917",
    "signature": "0xfa6a523d633ae0f53f5f029293d7b839910fc63489cb75421f4009b9468d89ba6b8426292efbf1207be4d3f4bd73b73a503f288b26bace6cca4d119a8ac5b5281b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}