{
  "manageEntity": {
    "action": "Save",
    "entityId": "1957052471",
    "entityType": "Track",
    "nonce": "0x7e8a5e138243879f5f67ef8d05d4dc529b73230c9ca2b9480a731f21d812cf43",
    "signature": "0xd25b70e21aee074e57556ac44f5049049f3660a8e4206f57609e7b719502ab645defb397554ac71b2e5ee183e6c2f51b5458a1f6007fd51a0caab0c35fe8a4f71b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}