{
  "manageEntity": {
    "action": "Save",
    "entityId": "771141606",
    "entityType": "Track",
    "nonce": "0xda5f194d1cf17fdbe2654c6f8f2cfe3759447224f388ba91628f67b07afa81af",
    "signature": "0x39525f889d864842025aaf08e890b3ef3b3133a8ab3889809cbb2aa1079fa37f3be0719c623014c2ae5794d3235721af1f9b6dfbfb74b2154da0d9579b48f2f21b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}