{
  "manageEntity": {
    "action": "Save",
    "entityId": "920649",
    "entityType": "Track",
    "nonce": "0x9ce90106fb4365f493c60fad3d0abd9d6f94190a5074989cb8dccbdfd695b5ec",
    "signature": "0x790f422c56102264add14ac907a2b462b309508d20f149e86190dd50eb55b2b0156adf62876845fec765c801394d83ade7fd3954c075bbf30d4e57c28f1edafd1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}