{
  "manageEntity": {
    "action": "Save",
    "entityId": "1867332515",
    "entityType": "Track",
    "nonce": "0xe1a246fd333c984cfdc96e33eb1530172f6ca54da16c3e354356425899a08d63",
    "signature": "0xd1ece37a2d7f6c19fe860dcf2b9bb074678e2ee606a741de31321b54af3c9d590c027f236c55b27857c9e9aebfbfb5a88bb7593342848264a688af348b45574e1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}