{
  "manageEntity": {
    "action": "Save",
    "entityId": "732253029",
    "entityType": "Track",
    "nonce": "0x2c391d2f97494e04ea036cb3fb6a2502247559786bf5f745a90d1d1cb6f0895a",
    "signature": "0x6090dd116d30ef2e7a7374df2d927db4fff93d554d6bd64f418550f92166f89d2cac7b3882732c6abcb753f97f4d45b82ad561b1fce3fb348aaa4f577806aeaf1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}