{
  "manageEntity": {
    "action": "Save",
    "entityId": "1318657720",
    "entityType": "Track",
    "nonce": "0xa2369e7372b6938e3c2748a7d16e5167841084bae1dbc5d0f9def42cc8d1b5ab",
    "signature": "0x3a9d7e9281e92e3ff91d4a933907bf56eee6e88e67b828d470e7889c5614e7a6599ba71b0ed7ea2ea87022d01b30c5eb00bccf3f8d719e7cae634d37e9d35dc71b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}