{
  "manageEntity": {
    "action": "Save",
    "entityId": "80087",
    "entityType": "Track",
    "nonce": "0xb75ae7c17934d508cbb0230e3e134227d97d7f70a27999be20102b4ee18e022e",
    "signature": "0xa4fa0a77f30e409bb4b52de9da68621e722dbd2a2b9e77ea24b741b3587f53be6e6adf1f230b780814a5895b21e3af1adae5ba1a9421283f039dde6adcd05b0b1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}