{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016476472",
    "entityType": "Track",
    "nonce": "0x9f8ec31417741e4aedda2a04c556cb85d9732e9c750dfcad6dd6e36fa651bc5f",
    "signature": "0x3433dd4954c63360d551890a3daaa6836c4bbd27f99596e4208d3fb08b5d6ba00f374c8803818736a71fa55d6fa28ace2690cee6ef55f9c2c6b3095054a0e2d01c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}