{
  "manageEntity": {
    "action": "Save",
    "entityId": "1636339000",
    "entityType": "Track",
    "nonce": "0x457374b2b0d57e24cae8ae89d3c7f4746c2f39dba336ebaaab54df6a15c49481",
    "signature": "0xcf4db011ac922a8790b4f1ad18319197514b18d354c4d722b10e299f6bcfcfd32d197e1b035d08d777e029f1e21b0471c523b615164cb2b395332afa0bb143f91b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}