{
  "manageEntity": {
    "action": "Save",
    "entityId": "777527244",
    "entityType": "Track",
    "nonce": "0x60d54be12031088f9ae5fa0b609386921fd117fc217f0cf288756cdfe7055553",
    "signature": "0xca3528ede68e17d6ea3e60cfb3d8194776c85381bed6baa0b90cc876c7cb2d9e2f37f96616993fec29d7ede5d126721ac7847fd9fcc1f44cced92de3072aedb61c",
    "signer": "0xcd6A27eA7cDE0E3443D438AA456580042dFFa5f3",
    "userId": "253973275"
  }
}