{
  "manageEntity": {
    "action": "Save",
    "entityId": "135772",
    "entityType": "Track",
    "nonce": "0xa1f5a8068912d9c5f99e3f886833763c37484a18cc03daf36c27889655da4421",
    "signature": "0x29c84236a161469f30fb933f7cac47a6f849f80ed1a7109d2a915fb351bcdab809ecc36ba6bef93f1c18f64b4a0657304610f5e22ec7255dde72450ea16afa231c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}