{
  "manageEntity": {
    "action": "Save",
    "entityId": "2052754192",
    "entityType": "Track",
    "nonce": "0xcc3103492a3d7332f97e77e0b3d487db2b5e40d6d315b8e2de3e5d0bbba70e30",
    "signature": "0x71f42e57794ad3a7212123a2a106537a120aa5962aead605499c7b499ebd22fe3ba4e56d74fc62488589d0ce95a98d3854f2b2acf002b855fd6a36231d63efd61c",
    "signer": "0x5C13CD392EcB86FaceF8A07FC5B300833E86cD23",
    "userId": "167249"
  }
}