{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098074909",
    "entityType": "Track",
    "nonce": "0x1f0f7c46cc212cf75ecb7948683df322711669274d7de5d1019793195084d3aa",
    "signature": "0xd90ce3d17634b4d33b9aae8b415873036cd57ff0914d70594572574e5baf95bf6fee551e0ce9f550f31782fafc324b88b0ceabe849393f930e27cd37e6d0dc411c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}