{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259970119",
    "entityType": "Track",
    "nonce": "1785604177863386677",
    "signature": "0x9abfa5a5ac735cce4ea8718cea727d5d75e30fc1656797bc648d24ddcecdc7da59c54830bfd12478e943c62663a6a62a6234e024a924a992e11c14d64b8b0f691c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}