{
  "manageEntity": {
    "action": "Save",
    "entityId": "273495",
    "entityType": "Track",
    "nonce": "0x77101c2d6f8083061a4a86b625a293e923b6fda727045618b784c9f3e8b61a7a",
    "signature": "0x5e06f19ece812b07924b2aeb5ded794fcbdebe1db6893b2e6d8e5081bf86472d7b34d51f1a79bf601d0d88929b0a0c046566e1ed2676a9dced37011912a676341b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}