{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758770238",
    "entityType": "Track",
    "nonce": "0xb41b79f41ae46b4822a594e07147d3f8bfc7e0852d6abff34f04be93734ee34b",
    "signature": "0x468f000e2afeaaad614f19fd356f7f12e5c2711d61b828394d4b51dc30c2cd321775b66140827e8322657ee15dab179b13813e590be67d708e75467f867949a61b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}