{
  "manageEntity": {
    "action": "Save",
    "entityId": "841277509",
    "entityType": "Track",
    "nonce": "0x3057e84e2ab95999dbd5aaab808fb2dd9c8f48d20d4cc18d000ddc1862b83df9",
    "signature": "0xd2c1fce97ec62a9aa6a3f0f240a00066beac9ad29e9880afecaffc0941db88773282c98f80b35bc843da2d7890a1ab26c9ebfc8470cd0393e99df0ee51ec72c11b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}