{
  "manageEntity": {
    "action": "Save",
    "entityId": "980369",
    "entityType": "Track",
    "nonce": "0xc499cf943dfa4b4fa2626f1b0ddf449483dc0c783121c891ae067cc45a3f601a",
    "signature": "0x4de9a0f254f3dfaec3372c7663ea46f30b17cc3dde2ef768c33f1f6ba9cfe3095ddf81c09d38ca1cd586480b0865de709611aba2a7c78fa7bc94147c4c15f23b1b",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}