{
  "manageEntity": {
    "action": "Save",
    "entityId": "761746432",
    "entityType": "Track",
    "nonce": "0x5c2e99466ace98cdb0a772d4dd9f9e846cc207ad1547a09522edbc3821f02183",
    "signature": "0x87af37c00141c73cd0e01ed30b12d2bfa4f5713715233e3d589c97a70c30076408a366e5573ac6f33467ff57441fbc1e53187c8e31350fdf7948d6ccd7f575471c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}