{
  "manageEntity": {
    "action": "Save",
    "entityId": "29751380",
    "entityType": "Track",
    "nonce": "0xe73a00342135d73c4f6ef8107bdcb9304c52a7092dd79b1d22cfde844d6d3134",
    "signature": "0xd5edd9d9ecf23eb865f0a721180de3fdf6959c4bb3bb33e1ccbc9cd8205a702861433ba11a227e998ba0cad2eec1124c64acd25fc1dab763e8902a87a70b572a1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}