{
  "manageEntity": {
    "action": "Save",
    "entityId": "679440563",
    "entityType": "Track",
    "nonce": "1792290878004594327",
    "signature": "0x66058276587b2b52e3380ee84819ad118317e2eacd9b5bb961f6fcbd836af1e8088156b208f32c216d279b1e3999fc5d4a481f28969e893b2479161d557eaece1b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}