{
  "manageEntity": {
    "action": "Save",
    "entityId": "623546514",
    "entityType": "Track",
    "nonce": "0x0813e2f2d1bcf68f843936e308fce7f2c8c87e8fb46988664dab5f4fc1320287",
    "signature": "0x5bf999573b0c66528816c454749debdea2988ba98c21f344ba5c4451bd88f37632fa6acd4aae079025bbfb8052e31acc351ab05a831de4d6ab6f670a78caf7981b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}