{
  "manageEntity": {
    "action": "Save",
    "entityId": "914220963",
    "entityType": "Track",
    "nonce": "0xa9cb22af95cca55b47ddecbbc67b7a2cdf4928149acb4ea20d31f5208e66a8b6",
    "signature": "0x2bff185d84487bb42596750f1b0eb780ce185b84313eed73f009eb5d919ec7302f3ad9c93ec28d0f2d5a2de5a3f885a287e8f0e983b00cc666244ff3524c386d1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}