{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216318597",
    "entityType": "Track",
    "nonce": "0x166783c360e0a672e25a05c91d85e6334bdd32e4f6ff05dcd5c6b3d83b33bf82",
    "signature": "0x6ba590385323db8749aec9860d3e78d322b13763321b8d39b22a7a9ff530f42177fa43a8aa050aa9f0e3def58a77e67c75c99c1ca1088a001475ecd432509a6b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}