{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "6600",
    "entityType": "User",
    "nonce": "0xefcc335632439592889d4f1f24248b2a997e765a4baaf620749f4977f4687b97",
    "signature": "0x1d58d849939a699bd32ffc81628144f069b45d6850c70a47d4dbcb3f8852fea97fc7cedb018694be15ccf95f1c51a2a08acac3cbde4d09d365163260a2cc04391b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}