{
  "manageEntity": {
    "action": "Save",
    "entityId": "632675",
    "entityType": "Track",
    "nonce": "0xe6dcb95cf5947e3973fc9bf9af89e6d6894c1b63b47c4e8ad7af91f9520f1d5d",
    "signature": "0x4884f29823bde0b862fe6820f4b4b6c1a1749fba798c85de193a69271d4e5d580285eabe7533ba98e11862e381a7fbb1aa30c7b18e2fb57ca8554f373dbef78f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}