{
  "manageEntity": {
    "action": "Save",
    "entityId": "534500750",
    "entityType": "Track",
    "nonce": "0x183ffbb45fa1e5f156f305c067918f8398f21bdab29f1e4fcd2947ebddd73e40",
    "signature": "0xaa4b3af179324d7c7f9860350fbb31cde7839718c611f2673c6d948781a13df15c8ff5e5af306d62745e9a0d33d5e596388b31155b2b4103ecfa765db7d68d7b1b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}