{
  "manageEntity": {
    "action": "Save",
    "entityId": "250019551",
    "entityType": "Track",
    "nonce": "1793018942077385252",
    "signature": "0x8cca68d64fe7da0ac3f64111553aa3e5d62719207bb4d3ad33483809bd5abd585068abd1bbdd33e82d1a4c2fb88105f4eedb55dd30e5679906ff3059509c0c4d1b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}