{
  "manageEntity": {
    "action": "Save",
    "entityId": "1028619",
    "entityType": "Track",
    "nonce": "0x262ca22f56141786d24817fc3c961fd1ea68f4198c434c5346ba61bbdf13c7d8",
    "signature": "0x545d0050311f2e2491f19cbc14dea158c284c82233731d9cc3e57ae9213cbfbb7252f9f9c7430297dedc85260af8af93c2f4c09ac5c8c7b33d3b1274ca2ed0cf1c",
    "signer": "0x01eB7915E4941D64a8ddf370bE06647ad5F79d4e",
    "userId": "911613164"
  }
}