{
  "manageEntity": {
    "action": "Save",
    "entityId": "1440563256",
    "entityType": "Track",
    "nonce": "0xbb0c8938aad2b439ca2c1f88db5170b3d75ccd648259b1571f4dd490bbfc7733",
    "signature": "0xe6913fe54a8a9d99ba98b0bc3cc9479278a0e53cabfb02cb0d0296325e0079041c7809936cceadd9a9b05d765c31f3d715520d98b853ac25c5e43de59a8937351b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}