{
  "manageEntity": {
    "action": "Save",
    "entityId": "245629394",
    "entityType": "Track",
    "nonce": "0xe5f321fcf4f6f7718ca237befbc8c06fe15db1df746adaa192e6a97cc938756c",
    "signature": "0x8ec3e22a60b71b08138c05b22e29607cd256160357bb5d70510f9e2a3a9935337e6fd551dee595e1807d0401b01794c54c191ddd1114e6c59c0e16a586aa199b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}