{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969764030",
    "entityType": "Track",
    "nonce": "0x8eded9d307ab8fd209a735e0d92870d5d3331e229210b919e5dd0302a868bf0d",
    "signature": "0xd8fb82b78158b67af6ad124afdbbe07d37c7a785f06fff59c34143735d03217338a7a793ec8c242fd2f1abce333147aa350a364e2940ffa6fc7280b449c25dfa1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}