{
  "manageEntity": {
    "action": "Save",
    "entityId": "380015888",
    "entityType": "Track",
    "nonce": "0x8664fc48e492669b6a32ed819da85f066d04151664aac4f0ec0c31823be6b8a6",
    "signature": "0x1f809ccdd1cbd497af4ab2e4f866f40feb29c7647daa8f59260773216658f99066984d6c3c679a512f50b6ca653660c967a347614b3c6176ca6e320ebc8a68eb1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}