{
  "manageEntity": {
    "action": "Save",
    "entityId": "68054662",
    "entityType": "Track",
    "nonce": "0x0f943bcc16718ebb5b172709c049ed86cd477af48961f663c547f3aa43bd916e",
    "signature": "0x379c54c5274342d3068e65386de45851c5b6c61b7f210dede544a855d34cd6f452fda144fa083cf7535b84114ef70e36d33cb1e4b0ba52007676a21dcbc352821c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}