{
  "manageEntity": {
    "action": "Save",
    "entityId": "956857320",
    "entityType": "Track",
    "nonce": "0x5b1fcb694b0c9d2a8431669004d05205a175e2c5c6139e8997ae40384803d8ac",
    "signature": "0xa053d2466256e934f75b5842231790df751f8691ecec93b680dfb202d234f26e516655d31230d949e10938034fd329300e945fc3ba971ddf820f6207481d051d1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}