{
  "manageEntity": {
    "action": "Save",
    "entityId": "435805523",
    "entityType": "Track",
    "nonce": "0x2da6633ba4587478eb23580f12f2332fecc3a5cc8b05c1d4b7668468f215ee90",
    "signature": "0x568e5122ae00050473f6b1ee788daf7abfd84719b351c457cbd12ad8c13a35af2c6ff15f4009d810c4a08b7d93057dbd37dee991b0961be725ec7a2a51ace6371b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}