{
  "manageEntity": {
    "action": "Save",
    "entityId": "267813888",
    "entityType": "Track",
    "nonce": "0x3619b39d5eccfb5e43627c605f0f3b1d18fc946cbfbcf6bc4d23607d1806bd29",
    "signature": "0xa38efa7039d51cbf11d87837f336788511408370b2930d77ff6931bf5aefc306681c388194402fc534df49ac064c2ce47edbb7e0158990afbcfa2166593e5a341c",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}