{
  "manageEntity": {
    "action": "Save",
    "entityId": "1623286887",
    "entityType": "Track",
    "nonce": "1792320952392052745",
    "signature": "0x262e211f1e3bef98691a9b7325319586fc5c0480914319d90c48227861db05c334dba2819492f15430e9a5bd3fa246a423ee39571655116d6fc55ef908b33c4c1b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}