{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341261659",
    "entityType": "Track",
    "nonce": "0x405872297c143634e3c570998472c6cec8e1d8bdd0df502f9ab6053d95635018",
    "signature": "0x2b4f20b1a4468830373ea444fcdb85a220cc82cab4c92357edc1c01ade56a06459fd631222a9a268df82b923d7271d8fa2a1d1a05a0a2a758102cdd67b42ed021b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}