{
  "manageEntity": {
    "action": "Save",
    "entityId": "916567368",
    "entityType": "Track",
    "nonce": "0xa4b04f5eb36bf3037f7e5da3aea543150873da1494e33d4b4721faa4815f6f13",
    "signature": "0x693808060c26bc6b56ec4b246e70115ac489fb98e16f250ec1c74387944aa6b819edf14b1e5dcc34325a82b18cbaa8a8d95ca300328328a39c31021b291d20771c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}