{
  "manageEntity": {
    "action": "Save",
    "entityId": "1825442358",
    "entityType": "Track",
    "nonce": "0x73f98ad001c0111b58c40ac970e4b32ca98ba8a0be2d51aaf7547387c6182870",
    "signature": "0xe5f7813e0d4fc370f30766cd774e780c176a959b887d2853874f0b7ea6d3cc3444c42be2a82ce07820c049cef9337e5db9fb7622d3160cb8fa278a8451c4841f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}