{
  "manageEntity": {
    "action": "Save",
    "entityId": "364919338",
    "entityType": "Track",
    "nonce": "0x1df5588b10b2caab592a043ebbae69755f46974af2d266445b3bbae40ed0a5bb",
    "signature": "0x15010367c24068e660797457b85644727bf91a91738b21d5e26b5a2b9919023601d987e40521e18bc5ee505298e97f4bb106228ef4526c39039c33aa546f7e051b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}