{
  "manageEntity": {
    "action": "Save",
    "entityId": "752965",
    "entityType": "Track",
    "nonce": "0xdb380aac031d47663e47962f6162165e19ba9ee8e1eb07ee1f5ae0d6c679e771",
    "signature": "0xa85b635410c91de3689e44ae5ba236d1b5c5cefa2aacdf629e54d74de086161b6e67f300af6f8ed04b7a92dc9f407986d89edc135b7ed943b94f358e6b53f15b1c",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}