{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "103121",
    "entityType": "User",
    "nonce": "0x3bc9c2e3270430aff9d8c639a1bf8579432480baf15a3ba17035946a61a7d054",
    "signature": "0xc6dde27a6e2346a4706428befabce808115da14b52eb6092ab2b5817c4da9bf840428d927ba3f4d94f3ee404fcc6ced4ba9dbd1e4715ef9b3fc4bfb62e3bbb611c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}