{
  "manageEntity": {
    "action": "Save",
    "entityId": "308675",
    "entityType": "Track",
    "nonce": "0x8dd86bcb42e3dd5ab42e41ccb831c13a2c70665aa6928cb48cd72d3a5c64f549",
    "signature": "0x8693177c070627a3cc90de69d95a0b181bda9bec741523d32aee2a4b849d7a9d2cde8309e77c75702f21452790f98491f06506e50751fa1d959880f4d953adef1b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}