{
  "manageEntity": {
    "action": "Save",
    "entityId": "413128",
    "entityType": "Track",
    "nonce": "0x5b2a98f568aff441f21fca9b56f44522091acd5e2873aabceda7b699104f6237",
    "signature": "0xabd4bc4d53ba7dc428caa9d59a98024a7c0c13422e6ecaea4f3d348a5fb0bc2125375ceb34b5a069f7b4625dd5c59c074f2855294af3cab00b91160e308bdd5f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}