{
  "manageEntity": {
    "action": "Save",
    "entityId": "336366272",
    "entityType": "Track",
    "nonce": "0x609489dd895bae82da21a1bef8f9088cb4a1c25a00b9cb7932001b67d677e574",
    "signature": "0xf258d6cbc87ab88c5eb4e92b7e0d89a98cdc1476e529664672b34bfb242201f23bd9475a61e82703a29d48d76bf592ffb523305a7e0e30d4bdebe149f54886b21b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}