{
  "manageEntity": {
    "action": "Save",
    "entityId": "1297189294",
    "entityType": "Track",
    "nonce": "0x8387a6f7b4f21c9e2a844631c5b4e27de10bba5e6f2781b7e28d984eda9fc465",
    "signature": "0x4cd1cf7fe87acc93c80dbb455234dbf9a60460285bb0bf75be2711c672ab593b4bf3413ea54aff59a38d9eacc2e5b87e42e7bcf9841ac6b56ccbb311b714f5d61c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}