{
  "manageEntity": {
    "action": "Save",
    "entityId": "2044465417",
    "entityType": "Track",
    "nonce": "0x20bde6cb07d3f4d2a8b80809aac9f594a1dfb5db9ec1a4f2ac6be73f2f8fbd44",
    "signature": "0xf8ab01a495fbce72996983d63559f3b58e7522265271f42a5c1a88797c52cdaa54936fd4419a86c79838a17cda480a3b5c33f6186312ca9e86ad82c55929b2af1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}