{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "450615362",
    "entityType": "User",
    "nonce": "0x1f4f04b384439728cbcba4f19a79ffda28a5977a123d7b490c33f0d4d5061b01",
    "signature": "0x0739eb70c224e3e5f3f8fffc21ac67246dca4c2226f80330f33f0561f8c5eb2f43a0b954b9c293a628b407a8506de530fb0a2ac9fc53591b26cef032978073761b",
    "signer": "0x2ecB36d417C08351D9724A6A64969FC9d58AE481",
    "userId": "788233206"
  }
}