{
  "manageEntity": {
    "action": "Save",
    "entityId": "1158378974",
    "entityType": "Track",
    "nonce": "0xd130b9a20663fe6f248571cf52d637b36387929674610cd87eb7c270fabe80dc",
    "signature": "0x1d4b1ce3a18771d4f33f10bcee44444959d8cd8a08703af7a87550869cee526c7d496abf274b49be7bdf9ee1811c8ec8c685491fb7df64dbc1eb81f33de36ed61b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}