{
  "manageEntity": {
    "action": "Save",
    "entityId": "1201247551",
    "entityType": "Track",
    "nonce": "0xfe5f741ccfd6b80d254f6b217c99b0dc88d5851f5e8d4f9b0461df19f16bfcab",
    "signature": "0x213ad4b143c3a18bb3275ccf7d1977c1e8c38091585cc766419a677eb30382f647ba84823ed914305f1907eb41b386445021cc079bf544579609040cf8df567a1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}