{
  "manageEntity": {
    "action": "Save",
    "entityId": "508709533",
    "entityType": "Track",
    "nonce": "0xba58c5a04a8cf22ee540879f2520dabff442f2a78376b82a0f3e1819f0fcda31",
    "signature": "0x976864d04c412634c9612eb8d7cbb13548a6baa01e066159e281d2b9bc5ee7ad3c60e8f9e8d65480a35674af103b2867b1b97f4ae8d760aca9819b99975c9bd31b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}