{
  "manageEntity": {
    "action": "Save",
    "entityId": "571558266",
    "entityType": "Track",
    "nonce": "0xc77e674879f0b68b397670d6603e913d5539ff193cd46670dcca972e3a629e53",
    "signature": "0xc6caeb395c48d0a1a5fe83d311075a733b83075239fc666dd7f4013dac4803d541ffaf803027285c32b360fe7c1a28e2d762fc8ca664edf72c4833ee64739e151c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}