{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116488",
    "entityType": "Track",
    "nonce": "0xa43ffc669e0b27695e787ec3f54e4a7802401bfd6b0aef72026644015d93de51",
    "signature": "0x408896d6d37b759979495f925f1e8822214cb9a9752caa2a2924f358b990cea462ffc97f883ffb9b7b690200846497f13a00e4ff446af5064d97d080a7a3d4dc1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}