{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309316086",
    "entityType": "Track",
    "nonce": "0x55aade84b0e2c72cb9e69965d4ee9b06fb4b8345263e04e775b75e3d4ef4b7a7",
    "signature": "0x9c875309adf807930bf9e9a6fa20893be0b121d05062665c51694b1c51674b036ea02b5cffa591b5cf920e7d89d8bac8f85a41edb00997a97798a91bc4c4101b1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}