{
  "manageEntity": {
    "action": "Save",
    "entityId": "762752",
    "entityType": "Track",
    "nonce": "0xd473fcea93d1a235c7fd8607c2f533e4197c2df7af62013bee4b267ab11c3d90",
    "signature": "0x824881ec2dcfe999344b14684888a7545c17eb29cef3b2b3fe992d52974b7d2b01a2b231182dcc8515b99cd937015d83f2d39ec19f95bbe6ff4913bf24e46aa21b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}