{
  "manageEntity": {
    "action": "Save",
    "entityId": "1887908398",
    "entityType": "Track",
    "nonce": "0x5d91985f67d004d62388787cdc5d71bfc28091887bbdead237e4685ab7a663c8",
    "signature": "0xd18d391c21186768a1d6d174f7ac569155e614425a11af1a2c660be7569a0e4639f7d1fdce17b5974c591a02dfecb2c0fa50b30ca28d8ae9d26e2ee40ba77cb21c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}