{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "515821762",
    "entityType": "User",
    "nonce": "0x5d1cde6bf962558bf69a541be3e9e5405f427e20a094a82911272b0aa8777ff8",
    "signature": "0x472da1cd8b638dc2b26ce45f5d743d4b7cd905bb94900590fd01360ff3022f2713487f093d7fd2f9baca8ff5c62a482d5615813450e0b578229671519ea86f731b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}