{
  "manageEntity": {
    "action": "Save",
    "entityId": "357404",
    "entityType": "Track",
    "nonce": "0xd0abf3415c4f9539326b7a7145602008f075600f02b3f75091a9e4e4b77edab1",
    "signature": "0x031473d57aeccd53010e815abcb815426408f6680bb62418fd86205582acd30372e41f48450baa3c1aeea81a3a9e014dc4530317a5f7832e43fa1d005b4c257a1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}