{
  "manageEntity": {
    "action": "Save",
    "entityId": "1678541368",
    "entityType": "Track",
    "nonce": "0xee64c77984dc772b398366d311a91be8f0be37152277cae5808d20a59e9dea40",
    "signature": "0x041d9acde59fe96bfc87089c1fed7168a952675fdb1ad18c8d6cd287ee382b0a5d4f4f358043ee1ef985389ee0b41c39652ca96262d5adf83fb92d3d7f5a66521b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}