{
  "manageEntity": {
    "action": "Save",
    "entityId": "1066169344",
    "entityType": "Track",
    "nonce": "0x7731bb85c4ed16a6101990b1e48e56f0ba0ed6c68b3a4943125229efad96e6c8",
    "signature": "0xf768c452b22b5bf0e87119a250c524aa308956bfac0ac7a98fbbaed5ad06c3027cb5200aea124a59675cd7993d944fccc06de5733931c2e822161548d3bf3a6c1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}