{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123674",
    "entityType": "User",
    "nonce": "0x13497017f908bcb98b45fc6de62f072ed52568bfaa61c03e57f177defa7ed268",
    "signature": "0x75f6d2f0782f2f3d1368f5f1433503c110d22c8ee59b48b57da2c52d4a6b1adf6877dba713d43db3ee89e0396a1ad1821e51d310ee47ce2e84a5c94a7c65b66e1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}