{
  "manageEntity": {
    "action": "Save",
    "entityId": "815777076",
    "entityType": "Track",
    "nonce": "0x23ede67cf33cd252e7a279098c20c635ab086b67774b7b203d99aca77c9e5841",
    "signature": "0x084bd8380956bdae35a96390e7f7015fb8097a70d982323c7013595ee3fb911f53c7d28f981f715dc6c66225ff6dbdb09ee0883374a775057ce73be819e1086b1b",
    "signer": "0x75387BeED3d3B040a54C3e303fF0B07Da67a9186",
    "userId": "223536026"
  }
}