{
  "manageEntity": {
    "action": "Save",
    "entityId": "85135718",
    "entityType": "Track",
    "nonce": "0xcfae10e4e927e1534c28f0cfe38c0aaa5b8842d3b7fbef9b49dfd190807e7c0f",
    "signature": "0x72d87c837c641fb6333158e8220fd7abe2c8a04aeac3d8614634a49f3a36110b7956ffea38e2bc55ad6fd3bb294b6fa60385207c6de6c6741956ed61876b4e081c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}