{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041381",
    "entityType": "Track",
    "nonce": "0xed42445908ea69ecbeb6e65454de85d47e48e438789b7b7f96b39656365c994d",
    "signature": "0xfcba2ef98cbba954f23152c52c6cd51d82b6a3181f08ff9aa594da2939c9569f26f41e4fb5bcac7863610a88e36f60420fb381ed92af899f3e858f2d58bb9dcb1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}