{
"manageEntity": {
"action": "Save",
"entityId": "589982889",
"entityType": "Track",
"nonce": "0xd8a0d092fbbf82182fa2db810a7c2964bd1252f5ed41d3d118626928d60f31de",
"signature": "0xe1a4cb31058622f415d208772ab34d3846e6af6ad93f24c5a706c11b1a81936d59a193d031d5d0502f8b83f83201ac97006e133b92c57ff6069aaa2b07fdf5ae1c",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}