{
  "manageEntity": {
    "action": "Save",
    "entityId": "56649764",
    "entityType": "Track",
    "nonce": "0xe3bb75eb1c7358e9e4ae690c210e36500a84c35803dcd379c05abb896668cde2",
    "signature": "0xddd985ca2d1a6c94b208fdd686aa2f06c1d72bbd4c180e50bee1523fd703a55736aebffb2f35a97de0e045580db49a6028b52429a4a5905df4cecaf226af54ac1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}