{
  "manageEntity": {
    "action": "Save",
    "entityId": "923957586",
    "entityType": "Track",
    "nonce": "0x4e1deb688b9ea9b5f5fb28e3d23b51887177b66c46afe0140acd7835e290206d",
    "signature": "0xf6d8c113498d8db2d150a306c9fe9b927a119ccd07643c74f21f8f156344e7d579cf5f0fab5b93e18f2671b5f3b5767d9ab5656f54b3275f7f2b84e2f98d9dda1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}