{
  "manageEntity": {
    "action": "Save",
    "entityId": "912222062",
    "entityType": "Track",
    "nonce": "0x1bbc20dbbe04f62c61e9707f6efbd4b6a4814acd08b017236e6507acac4549e3",
    "signature": "0x2be23424d26e8351a1f964bc882f8c7f49125ce73870754ae420eebc7967c22f23a83a43b379b53338eabf49fa3f4bbe45d9066844d5755de934d3c420200ba91c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}