{
  "manageEntity": {
    "action": "Save",
    "entityId": "2077115936",
    "entityType": "Track",
    "nonce": "0x65dad2dce5bebb3cc37a0ea499e8e59f703a7e009c14626a44f5f9a1712a8b8f",
    "signature": "0x7b2c6016f024708148f5a4ca3a42bf300dea7c37e29ea9be500670cc758ffb01675a3b57256666c59113f141ede75325215d5d2045f8166cd548f5929caab2071c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}