{
  "manageEntity": {
    "action": "Save",
    "entityId": "174772949",
    "entityType": "Track",
    "nonce": "0xd44eb97a4453dd0124e48d570025a405a63147d62b6f17c3662a28ed46ac40d3",
    "signature": "0x3ef7d362dd73e85243efb27e5459c8ffa8634dfb5de874fd3b57f9b1ceecac5324ed5065625e6ff9ec69dbdceeb4b52413b32fab306fb6fe8aab717e250a8bab1c",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}