{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285257940",
    "entityType": "Track",
    "nonce": "0x0fda173caf4f8b0814505b9f443f6de8389d63243c806f275fe88a4604c47d85",
    "signature": "0x6ecc34ff587e65c334d0f588f1ae641e8f82a9b7cb3dccbad51694aaca15a77b44fb8f22ccc1cf4f005e3d1389c613634787835c78fb1c1cda394fbac3c5eb5b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}