{
  "manageEntity": {
    "action": "Save",
    "entityId": "235429",
    "entityType": "Track",
    "nonce": "0x0e03239e677d313a095fb85a8756748823c48ca7aee4a534e2a4df09fcba417a",
    "signature": "0x1b281d5904efaabf86fa4b4c290bccc1f2538c644bafd0a77660e74447573699725dfa1309fc9d6fbec02619c784474b4dc5d033d5ee60b8f2dc3e766096c13a1c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}