{
  "manageEntity": {
    "action": "Save",
    "entityId": "692380412",
    "entityType": "Track",
    "nonce": "0x0514f21feb7f8f80b38b7039172752d3b0412ae702038cb34f15a3a050c00af0",
    "signature": "0x7be611d50eb482204ed0e47facb3b44a5b52df1a61b4902dacb53ade7435c5080462a6a47e5a7bf2b7b828384f32850a7acd1cb4a3f009684a51a815cf64c5491b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}