{
  "manageEntity": {
    "action": "Save",
    "entityId": "1133859500",
    "entityType": "Track",
    "nonce": "0x50a35a39e147b4f3822c23da7a3b584fc33c5469c30070b9d23c4cb8e0d816b2",
    "signature": "0xfb4aee2c35085d53b2e077aaa68520ce57ca5c5f3fc3a819831de8bae0dfe0192496235c0314b1ef201d4532c0671e29b55808a5be45b453a8881addea1a86191c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}