{
  "manageEntity": {
    "action": "Save",
    "entityId": "767016",
    "entityType": "Track",
    "nonce": "0x3146d08358b33dc3d2aec822c14bc8a2ece3914e402008af0aae2ef3a429e101",
    "signature": "0x362c12b7abaa5a42ee0f845d79a7986e77449ad51ca8138ca1272b5b046944517da93d63858acb62e37b5f03a411cee4a921d0cb54d9663d836d89f865922f4a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}