{
  "manageEntity": {
    "action": "Save",
    "entityId": "317480",
    "entityType": "Track",
    "nonce": "0xaf05793518b90dc540d02b1ceedb4f4adbc83c18cfd8cc52d6c9c574657316d4",
    "signature": "0xa7d486d63ca60724d43ff6d0dd0909391d9b32680db64e7ce3afc43910a435e65cf3c995be43840d3cbcbf10ce6b94142df374402392fbfe033cbcd40a08980d1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}