{
  "manageEntity": {
    "action": "Save",
    "entityId": "131958034",
    "entityType": "Track",
    "nonce": "0xcc8860635d1d3f849128852d6ea90b20f07b43de1ac88b083368e2e240cca79c",
    "signature": "0xfa239a012d443a114c0b3f368eaa217f9c6118e58ea8595f4fb77117bb7d72cc76c6e679396bf3fa2869fe9f469d7c7bf2f0dc7fe67c854fab952938c0397ee71c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}