{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559217963",
    "entityType": "Track",
    "nonce": "0xfca8f7b3d4d0dd318a3eb8746a5879c6df748eee0cca1704a466601712f65873",
    "signature": "0x5084e122072778fab1bbd56c3f37b952763368b1767d67ab616a894ab190daa6211b8dd0b2f529f431a77eac226647a6338b8e4c3c14f99ba4dee50fb9f0a7521c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}