{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780847072",
    "entityType": "Track",
    "nonce": "0x880f26d2ce05d93e287d34d6f19d766d3bb580e6e39e3a096b468a38251d9689",
    "signature": "0x332876becb5f9ff96eb2b9c435139779270cedf6c6133efce47d4b4427648f7d4a9f7dcd91bfd9a53aae80032b055e79f4cdadbf4274a8365012393d68d150891c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}