{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038903812",
    "entityType": "Track",
    "nonce": "1793730541601954075",
    "signature": "0xb968d83e031c01de5f99a12243e564adee5d90e6d8d2173f496acd90999aae8522c8572cb2228febe73169a1fda93dad8954ae7e2694a5e3f1e7a64ef84ba0b61b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}