{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "473761906",
    "entityType": "Track",
    "nonce": "0x9c004fd1928f4b0f475d1305c6e582dee14a2aa245d99706e11441af4b03edfe",
    "signature": "0xe0269c34eb87d1d3a04c4bc957e48cdf01c57a0bf6b00aa4fb6aa8acc59e40560050ba6b1cc47ee0fdb8aec622a5e80633d6598c05903037abee3e44c9610cc71b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}