{
  "manageEntity": {
    "action": "Save",
    "entityId": "1839036032",
    "entityType": "Track",
    "nonce": "0x77918decdf9f4d0f897c4f19cf61b4d536fc42734957c66b5b4d689ff7279640",
    "signature": "0xb523d4e7df772b8d913582db0aa4fef57616005f06ce96e15dd5db5ab388aae60e3d5a4fc3782cba4582e91ac7f277a3f134fd8040c0f3f0f547e7fe702e2a521b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}