{
  "manageEntity": {
    "action": "Save",
    "entityId": "1850874486",
    "entityType": "Track",
    "nonce": "0x517860b53be7c29b3955ddbeb35a30342a574522af8e656327c77dc684ee3f11",
    "signature": "0xf1575c8901e3debcabcd3d6eada01ed0e3210e6fc8e5f617a224d720db9c48af055ecb8c56865398991c3d1a2542916a8d2a8d397270adaa8834c168c473c7b71b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}