{
  "manageEntity": {
    "action": "Save",
    "entityId": "1212126032",
    "entityType": "Track",
    "nonce": "0x2246c5055c9d6ee6d98f0f02c62fa0204da8637842262fabbaae6e302e95a2a8",
    "signature": "0x353d1a5d3a9588b98f7c1d64bc3b83b8b6810d3a1545273c9f8b9663bd7b9c0d2ed7e9c64975eb82158db1f73bb3cf03a8072d2a23fe25e1ad01d2407c4b1b9d1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}