{
  "manageEntity": {
    "action": "Save",
    "entityId": "1487578272",
    "entityType": "Track",
    "nonce": "0x8ba707102e0824adde176f669ba42ddbe45ef1cea5046d60d1b2b9afe5a94ca6",
    "signature": "0x013a51b478a17fb95e77e76b2e594d3daa142c9fa3a8cf6587befcd8707f370a52fae1b9c4cd88cfb52504b64fda85aebe334f48e783c5bd4305ac27b8ff67cd1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}