{
  "manageEntity": {
    "action": "Save",
    "entityId": "375917",
    "entityType": "Track",
    "nonce": "0x56b7cab18e5cc167a707858dce3efb08b8c5f587dbfd73ca37f6ce6fbdd3cee5",
    "signature": "0xdc6dfee574792fa4ae01c250358cfe5dd77e5eaa600ffda9ed1294b9705a8b9b52bf49d2fd43237338336c3a249e688218e69ae2e921ae150829f3ff491c51891c",
    "signer": "0x9BaE2e1849D39772019b4AC3468e938a232f73ee",
    "userId": "948584098"
  }
}