{
  "manageEntity": {
    "action": "Save",
    "entityId": "1679262788",
    "entityType": "Track",
    "nonce": "0xe9fe705ee1dc1297bb33b277afb8a7e8e2bdc265ff60f0d4c7c901c9a76ff7d1",
    "signature": "0xf6961e933fbbf8b93dd323ae83719458695dad244c4c041a0be47e070f5725713e1da234bbbfabb82742adfe1e59b32a7426c0bd7fc817c8c37152206d4bfb251b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}