{
  "manageEntity": {
    "action": "Save",
    "entityId": "487396",
    "entityType": "Track",
    "nonce": "0xce4233c3cd335c3e58a98cd736bfc3233dcfb744ec81c2ea4dd0da4f52848670",
    "signature": "0x8befc8b2b087a9eb1add279c2b574fb53ada96a0f58532580efe2b8828017aed6694aa03ab5ca2eaa1d21f4f7bbe7caf5ec7cd448f1e45e47d903b356436f9f11b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}