{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210828791",
    "entityType": "Track",
    "nonce": "0xaaa13036a4215c3c9d3d5b9dbede1aee3206daa09bde04f813e4519fd201a467",
    "signature": "0x14dd6f187d66a75b497acb2462fe3f2acb285342fbc2f267bbca6f2ad71d04d5389c898392f5b8a97a83c91437779828bf0214d8937cd18dbbd184e1554404a71b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}