{
  "manageEntity": {
    "action": "Save",
    "entityId": "890055816",
    "entityType": "Track",
    "nonce": "0x56dc3758de372ec161a965c390bcb03ca7afdf1c6e2d5aa694cc8ffd4fdcb85f",
    "signature": "0xa26f542f235cb512d98a47d9e08b6eb0dc4354e372fd07f48e5f85b8590ed3585b3c468a44a6ac559a39b405160fe94ab2c588dbf067a14ae6e633b69c568e3d1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}