{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "520835",
    "entityType": "Track",
    "nonce": "0x5d285beae58effd5ac6d5bd810cd700e4cbe9775d34b3ddac95471d45774a914",
    "signature": "0x4f202678cf27bbcde4874bc9738c320833181d578381d66ecb5a521db101a7833354a7df6b97cdc9f57065a1109563e6f5b20dc6a0211a5d315105619c5f312f1c",
    "signer": "0x11F37c73bc250F79db38fa78e76e4aFA34e39B30",
    "userId": "295957"
  }
}